Time in IDLW and KST
The time difference between International Date Line West Time (IDLW) and Korea Standard Time (KST) is 21 hours. Korea Standard Time is 21 hours ahead of International Date Line West Time.
This means 9am IDLW is 6am KST (next day) and 5pm IDLW is 2pm KST (next day).
International Date Line West Time
- The current local time in IDLW is 12:36 am (July 19, 2026)
- IDLW time zone offset is UTC-12:00
Korea Standard Time
- The current local time in KST is 9:36 pm (July 18, 2026)
- KST time zone offset is UTC+09:00
How to convert International Date Line West Time to Korea Standard Time?
Add 21 hours to International Date Line West Time to get Korea Standard Time.
Time in IDLW
00:00
Time in KST
00:00
Use the slider above to convert International Date Line West Time to Korea Standard Time and view the day and night map at different times.
Day–night colors on the map:
Day
Civil twilight
Nautical twilight
Astronomical twilight
NightTime Conversion Chart
| IDLW | KST |
|---|---|
| 12am | 9pm |
| 1am | 10pm |
| 2am | 11pm |
| 3am | 12am |
| 4am | 1am |
| 5am | 2am |
| 6am | 3am |
| 7am | 4am |
| 8am | 5am |
| 9am | 6am |
| 10am | 7am |
| 11am | 8am |
| 12pm | 9am |
| 1pm | 10am |
| 2pm | 11am |
| 3pm | 12pm |
| 4pm | 1pm |
| 5pm | 2pm |
| 6pm | 3pm |
| 7pm | 4pm |
| 8pm | 5pm |
| 9pm | 6pm |
| 10pm | 7pm |
| 11pm | 8pm |